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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_MEMORY_REF_COUNTED_DELETE_ON_SEQUENCE_H_ | 5 #ifndef BASE_MEMORY_REF_COUNTED_DELETE_ON_SEQUENCE_H_ |
6 #define BASE_MEMORY_REF_COUNTED_DELETE_ON_SEQUENCE_H_ | 6 #define BASE_MEMORY_REF_COUNTED_DELETE_ON_SEQUENCE_H_ |
7 | 7 |
8 #include <utility> | 8 #include <utility> |
9 | 9 |
10 #include "base/location.h" | 10 #include "base/location.h" |
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26 // ... | 26 // ... |
27 // private: | 27 // private: |
28 // friend class RefCountedDeleteOnSequence<Foo>; | 28 // friend class RefCountedDeleteOnSequence<Foo>; |
29 // friend class DeleteHelper<Foo>; | 29 // friend class DeleteHelper<Foo>; |
30 // | 30 // |
31 // ~Foo(); | 31 // ~Foo(); |
32 // }; | 32 // }; |
33 template <class T> | 33 template <class T> |
34 class RefCountedDeleteOnSequence : public subtle::RefCountedThreadSafeBase { | 34 class RefCountedDeleteOnSequence : public subtle::RefCountedThreadSafeBase { |
35 public: | 35 public: |
| 36 static constexpr subtle::StartRefCountFromZeroTag kRefCountPreference = |
| 37 subtle::kStartRefCountFromZeroTag; |
| 38 |
36 // A SequencedTaskRunner for the current sequence can be acquired by calling | 39 // A SequencedTaskRunner for the current sequence can be acquired by calling |
37 // SequencedTaskRunnerHandle::Get(). | 40 // SequencedTaskRunnerHandle::Get(). |
38 RefCountedDeleteOnSequence(scoped_refptr<SequencedTaskRunner> task_runner) | 41 RefCountedDeleteOnSequence(scoped_refptr<SequencedTaskRunner> task_runner) |
39 : task_runner_(std::move(task_runner)) { | 42 : subtle::RefCountedThreadSafeBase(T::kRefCountPreference), |
| 43 task_runner_(std::move(task_runner)) { |
40 DCHECK(task_runner_); | 44 DCHECK(task_runner_); |
41 } | 45 } |
42 | 46 |
43 void AddRef() const { subtle::RefCountedThreadSafeBase::AddRef(); } | 47 void AddRef() const { subtle::RefCountedThreadSafeBase::AddRef(); } |
44 | 48 |
45 void Release() const { | 49 void Release() const { |
46 if (subtle::RefCountedThreadSafeBase::Release()) | 50 if (subtle::RefCountedThreadSafeBase::Release()) |
47 DestructOnSequence(); | 51 DestructOnSequence(); |
48 } | 52 } |
49 | 53 |
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61 } | 65 } |
62 | 66 |
63 const scoped_refptr<SequencedTaskRunner> task_runner_; | 67 const scoped_refptr<SequencedTaskRunner> task_runner_; |
64 | 68 |
65 DISALLOW_COPY_AND_ASSIGN(RefCountedDeleteOnSequence); | 69 DISALLOW_COPY_AND_ASSIGN(RefCountedDeleteOnSequence); |
66 }; | 70 }; |
67 | 71 |
68 } // namespace base | 72 } // namespace base |
69 | 73 |
70 #endif // BASE_MEMORY_REF_COUNTED_DELETE_ON_SEQUENCE_H_ | 74 #endif // BASE_MEMORY_REF_COUNTED_DELETE_ON_SEQUENCE_H_ |
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